Add get_output_mapping to build_py and build_ext
#3392
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abravalheri
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Jun 19, 2022
ambv
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Sep 21, 2022
This is needed due to setuptools 64.0.0 implementing PEP 660 and circumventing usage of `write_stub_file` in `copy_extensions_to_source` (see: pypa/setuptools#3392) In turn, we require setuptools 64.0.0 or higher.
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This is another set of changes targeting PEP 660.
The existing PoC implementation of PEP 660 "persuades" build_py and build_ext to symlink/hardlink files instead of copying, but the problem with this approach is that we don't have any visibility of what is happening.
In this PR I am proposing to expose
get_output_mapping(together with the existingget_outputs). This will probably be the basis of the "protocol"editable_wheelwill use for handlingbuildsubcommands.get_output_mappingshould a mapping between destination files as they would be produced by the build (dict keys) into the respective existing (source) files (dict values).Existing (source) files should be represented as strings relative to the project root directory.
Destination files should be strings in the form of
"{build_lib}/destination/file/path".Pull Request Checklist
changelog.d/.(See documentation for details)